Hydrogenation heat gas chemical yield increasing solution component for low-permeability sandstone reservoir oil well

Abstract

The invention belongs to the technical field of oil exploitation, and particularly relates to a hydrogenation heat gas chemical yield increasing solution component capable of being used for increasing productivity of a low-permeability sandstone reservoir oil well. The solution component comprises first solution and second solution, the mass ratio of the first solution to the second solution is 1:1, by the mass sum of 100%, the first solution comprises nitric acid cholamine complex HOCH2CH2NH2*HNO3, ammonium nitrate NH4NO3 and water H2O, and the second solution comprises hydrazine nitrate N2H4*HNO3, sodium hydride NaH, sodium aluminum hydride NaAlH4 and tetrachloroethylene C2Cl4. Gas released in reaction of the first solution and the second solution can carry heat and enter air holes and micro-cracks of near wellbore region rock strata through a well-cased perforating area, the near wellbore region rock strata can generate new cracks under continuous heat shock action of high-temperature high-pressure gas, oil-gas seepage channels are communicated, seepage resistance is decreased, drainage area is increased, and accordingly, permeability of the near wellbore region rock strata is improved.

Description

technical field

[0001] The invention belongs to the technical field of petroleum exploitation, and in particular relates to a solution component of hydrogenation hot gas chemical stimulation that can be used to improve the production capacity of oil wells in low-permeability sandstone reservoirs. Background technique

[0002] Low-permeability sandstone reservoirs have the characteristics of strong heterogeneity, reservoir productivity is greatly affected by lithology and physical factors, and natural productivity is low. Reservoirs need to be modified to see better development results. Hydraulic fracturing is It is a common method for stimulation of low-permeability sandstone reservoirs.

[0003] Hydraulic fracturing uses high-pressure pumps on the ground to pump high-viscosity fracturing fluid into the well. When the fluid pressure in the fracturing section reaches a certain value, the fracture opens. With the addition of proppant (usually ceramsite), the fracture gradually...

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